Absolute Oscillator Strengths in the Ultraviolet and Vacuum Ultraviolet

Details Absolute Oscillator Strengths in the Ultraviolet and Vacuum Ultraviolet Absolute Oscillator Strengths in the Ultraviolet and Vacuum Ultraviolet

Oct 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998phdt........26m&link_type=abstract

Thesis (PHD). THE UNIVERSITY OF WISCONSIN - MADISON , Source DAI-B 59/04, p. 1699, Oct 1998, 120 pages.

Physics

Scientific paper

Accurate oscillator strengths are required in the ultraviolet and vacuum ultraviolet regions of the spectrum for elemental abundance studies on the Interstellar Medium and stellar photosphere. We have a developed a new High Sensitivity Absorption Experiment at the University of Wisconsin to measure absolute oscillator strengths in the vacuum ultraviolet to an accuracy of ~10%. In most cases, our measurements are the first laboratory measurements made for the transitions. The absorption experiment measures relative oscillator strengths for lines from the same lower level, usually a vacuum ultraviolet transition relative to an ultraviolet transition. Accurate ultraviolet oscillator strengths determined by combining emission branching fraction measurements with radiative lifetimes from laser-induced fluorescence measurements are used to normalize the absorption measurements.

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